I'd suspect it might just be a marketing ploy. It's good to be able to offer something which no one else has. The IAS would be a good place to find out. It may only be something like a Thai Giant with a new label, one that has been grown in Malaysia perhaps.

Definitely A. portei will look different to a Thai Giant. This is a photo of some I came across in my wanderings a few years ago. It was in New Guinea though, so maybe it could be called "Alocasia New Guinea Monster".

on the plus side that excites me, thats a plant i have admired from my computer chair only...and searched quite a bit for...I just cant swallow the cost of buying starts online, or the thought of a resonably common extremly fast growing plant is really going to cost 20+ for a start with 3 tiny leaves...

theres always lots of nice overflow from agristarts tho, once they start carring something its only a matter of time til it floats thru here : D

I know this is an old post, but had to add my 2 cents. I grew several Malaysian Monsters in my garden in Maryland, zone 7a, about 30 miles NW of Washington DC, last summer 2014. My favorite alocasia! I found out it likes open shade very bright light , maybe some direct morning. It didn't burn in more sun, but much smaller. I measured leaves over 3' long. Lots of fish emulsion and fert for me.